On
the other hand, the birth-rate _falls_ as one passes to the wards that
have most native-born residents, most education, most prosperity--and,
to some extent, education and prosperity denote efficiency and eugenic
value. For 27 wards there is a high negative correlation (-.673),
between birth-rate and percentage of native-born of native parents in
the population. The correlation between illiteracy and net increase[66]
is +.731.
The net increase of Pittsburgh's population, therefore, is greatest
where the percentage of foreign-born and of illiterates is greatest.
The significance of such figures in natural selection must be evident.
Pittsburgh, like probably all large cities in civilized countries,
breeds from the bottom. The lower a class is in the scale of
intelligence, the greater is its reproductive contribution. Recalling
that intelligence is inherited, that like begets like in this respect,
one can hardly feel encouraged over the quality of the population of
Pittsburgh, a few generations hence.
Of course these illiterate foreign laborers are, from a eugenic point of
view, not wholly bad. The picture should not be painted any blacker than
the original. Some of these ignorant stocks, in another generation and
with decent surroundings, will furnish excellent citizens.
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